A 30-centimeter (1-foot) tsunami was recorded at 6:45 a.m. on Nakanoshima, a small island to the south of Kyushu, Japan's southernmost main island. A tsunami advisory for Kagoshima prefecture and a string of small islands was lifted at 7:20 a.m.

Two nuclear reactors on Kyushu island were not affected by the incident, the plants' operator said.

Tetsuro Shinchi, a Kagoshima prefectural government official, said that although there had been no reports of damage, residents were being urged to use caution.

A 2011 earthquake and tsunami near northeast Japan killed thousands of people.